47. Packera spellenbergii (T. M. Barkley) C. Jeffrey, Kew Bull. 47: 101. 1992.
Carrizo Creek ragwort
Senecio spellenbergii T. M. Barkley, Phytologia 67: 248, fig. 5. 1989; Senecio cliffordii N. D. Atwood & S. L. Welsh
Perennials, 3–6+ cm; fibrous-rooted and/or rhizomatous (bases coarse, weakly creeping or suberect). Stems usually 1, sometimes 2, densely tomentose (at least proximally), becoming glabrate distally. Basal leaves (relatively leathery) sessile; blades linear, 10–15+ × 1–2 mm, margins entire (revolute). Cauline leaves abruptly reduced (linear, bractlike). Heads 1(–2). Peduncles bracteate, tomentose or glabrate. Calyculi conspicuous. Phyllaries 13, purple to deep reddish purple, 6–9+ mm, hairy or glabrescent. Ray florets 0 or 5–8; corolla laminae 4–7 mm. Disc florets 30–40+; corolla tubes 2.5–3.5 mm, limbs 3.5–4 mm. Cypselae 3–3.5 mm, hirtellous; pappi 5–6 mm.
Flowering mid Apr–mid May. Calcareous soils, sparsely vegetated areas of short-grass prairies; of conservation concern; 1600–2200 m; N.Mex., Utah.
Packera spellenbergii is known only from Harding and Union counties, New Mexico, and Kane County, Utah. The plants are succulent, have deeply cyanic herbage, and conspicuously revolute leaves.